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Texas Instruments ADS7841ES/2K5G4
- Part No.:
- ADS7841ES/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS7841ES/2K5G4.pdf
- Description:
- IC ADC 12BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,903
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Product details
Overview
ADS7841ES/2K5G4 from Texas Instruments is a 12-bit, 4-channel SAR analog-to-digital converter with synchronous serial interface, ±1 LSB INL/DNL, 72 dB SINAD, and operation up to 200 kHz conversion rate at +5 V. It supports single-ended or differential input configurations and features programmable 8-/12-bit resolution, internal sample-and-hold, and shutdown mode consuming <15 µW. It is deployed in high-precision, battery-powered data acquisition systems requiring extended temperature reliability.
For engineers reviewing the ADS7841ES/2K5G4 datasheet, ADS7841ES/2K5G4 pinout, ADS7841ES/2K5G4 application, or ADS7841ES/2K5G4 equivalent, key selection criteria include its SSOP-16 package, –40°C to +125°C operating range, 2.7 V to 5 V single-supply operation, and compatibility with isolated serial interfaces for remote sensing.
Technical Context
The ADS7841ES/2K5G4 implements a capacitive redistribution SAR architecture with integrated multiplexer and sample-and-hold. Its analog front-end accepts four single-ended inputs (CH0–CH3) referenced to COM or two differential pairs, configurable via serial control bits (A2–A0, SGL/DIF). The CDAC-based conversion core operates synchronously with an external DCLK, requiring 12 clock cycles for acquisition and 12 for conversion in standard 24-cycle mode.
Digital control is handled through a 3-byte serial protocol over DIN/DOUT with CS and DCLK, supporting 8-bit or 12-bit output formats and three power modes (full, auto power-down, shutdown). The MODE pin fixes resolution to 12-bit when low, enabling deterministic timing for real-time embedded systems where jitter-sensitive sampling is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR with no missing codes; enables 1:4096 dynamic range for precision sensor digitization. |
| Conversion Rate | Up to 200 kHz at +5 V; supports real-time monitoring of fast transients in industrial control loops. |
| INL / DNL | ±1 LSB max (typ); ensures monotonicity and linearity critical for closed-loop feedback accuracy. |
| SINAD | 72 dB at 10 kHz; delivers >11.6 ENOB for high-fidelity signal capture in test equipment. |
| Supply Range | 2.7 V to 5 V single supply; allows direct interfacing with Li-ion batteries or 3.3 V/5 V logic domains. |
| Operating Temp | –40°C to +125°C (ES grade); qualified for under-hood automotive or industrial edge nodes. |
| Package | SSOP-16 (DBQ); 5.3 mm × 6.2 mm footprint with 0.65 mm pitch, suitable for compact PCB layouts. |
Pinout & Package
ADS7841ES/2K5G4 is housed in a 16-pin SSOP (DBQ) package with exposed thermal pad (not electrically connected). Pin spacing is 0.65 mm; body dimensions are 5.3 mm × 6.2 mm × 1.75 mm. Recommended reflow profile complies with JEDEC J-STD-020C for moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9, +VCC | Power supply input | Dual VCC pins reduce supply impedance; must be decoupled locally with 0.1 µF ceramic + 1–10 µF bulk capacitor. |
| 2–5, CH0–CH3 | Analog input channels | Four independent single-ended or paired differential inputs; COM-referenced for zero-code alignment. |
| 6, COM | Analog ground reference | Sets zero code in single-ended mode; may be tied to system AGND or offset voltage for bipolar input ranges. |
| 7, SHDN | Shutdown control | Active-low; reduces quiescent current to <15 µW-enables microamp-level sleep in portable instruments. |
| 8, VREF | External reference input | Unbuffered; accepts 0.1 V to +VCC; LSB = VREF/4096; requires low-noise, low-impedance source. |
| 10, GND | Analog/digital ground | Single ground pin; layout best practice: star-ground near VREF and COM, separate from digital return paths. |
| 11, MODE | Resolution select | Low = fixed 12-bit mode; eliminates software dependency on control byte MODE bit for deterministic timing. |
| 12, DOUT | Serial data output | High-impedance when CS = high; outputs straight-binary MSB-first on DCLK falling edge. |
| 13, BUSY | Conversion status flag | Active-high during acquisition/conversion; used for hardware handshaking without polling DOUT timing. |
| 14, DIN | Serial data input | Latches control byte on DCLK rising edge; accepts start bit (S), channel/address, and power-mode bits. |
| 15, CS | Chip select | Active-low; initiates conversion sequence and enables DOUT/BUSY; must remain low for full 24-clock cycle. |
| 16, DCLK | Serial clock input | Drives both conversion timing and serial I/O; max frequency = 3.2 MHz (200 kHz rate); CMOS-compatible. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable resolution (8/12-bit) | Reduces serial transfer time by 25% in 8-bit mode; enables dual conversions per 24-clock window for throughput scaling. |
| On-chip 4-channel multiplexer | Eliminates external analog switching components; supports time-multiplexed multi-sensor acquisition with <500 ns settling. |
| Auto power-down (PD1/PD0 = 00) | Cuts average supply current to ~3 µA between conversions-extends battery life in intermittent-sampling applications. |
| Reference flexibility (0.1 V to +VCC) | Enables direct digitization of mV-level thermocouple or bridge outputs without gain amplification stages. |
| CMOS-compatible digital interface | Supports mixed-voltage systems: DIN/DOUT tolerate 5.5 V regardless of +VCC (2.7–5 V), easing FPGA/microcontroller integration. |
Applications
| Industrial Data Logger | Portable Medical Monitor |
|---|---|
|
Use Scenario: Multi-channel logging of temperature, pressure, and humidity sensors in field-deployed environmental stations. IC Role / Device Role / Timing Role: Central 12-bit ADC acquiring synchronized samples from four analog sensors every 10 ms using internal multiplexer and serial interface. Use Value: Single-chip solution reduces BOM count and PCB area; 200 kHz rate allows oversampling for noise reduction; –40°C to +125°C rating ensures outdoor reliability. |
Use Scenario: Battery-powered ECG and SpO₂ monitor requiring low-power, high-linearity analog front-end. IC Role / Device Role / Timing Role: Precision digitizer for conditioned biopotential signals, operating in 12-bit mode with 2.7 V supply and auto power-down between heartbeats. Use Value: <15 µW shutdown current extends battery life; ±1 LSB linearity preserves diagnostic waveform fidelity; SSOP-16 eases miniaturization. |
| Automotive Cabin Sensor Hub | Test Equipment Signal Capture |
|
Use Scenario: In-vehicle air quality and cabin climate controller aggregating CO₂, VOC, and ambient temperature readings. IC Role / Device Role / Timing Role: High-temperature ADC interfaced to microcontroller via SPI-like serial bus, sampling all channels every 100 ms. Use Value: +125°C qualification meets AEC-Q100 Grade 1 requirements; COM pin flexibility supports ratiometric sensor referencing; low THD avoids signal distortion. |
Use Scenario: Benchtop multichannel oscilloscope module capturing transient waveforms up to 100 kHz bandwidth. IC Role / Device Role / Timing Role: Digitizer with 72 dB SINAD and 125 kHz effective rate (at 2.7 V), feeding FPGA-based real-time FFT engine. Use Value: Straight-binary output simplifies FPGA parsing; BUSY pin enables precise trigger synchronization; channel isolation >100 dB prevents crosstalk in multi-probe setups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7841EB/2K5 | Same SSOP-16 package and pinout; ±1 LSB INL/±3 LSB DNL (vs ±2/±4 for ADS7841ES/2K5); rated –40°C to +85°C only. | Lower temperature grade limits use in under-hood or high-ambient industrial environments. | Select ADS7841EB/2K5 only if full –40°C to +125°C operation is unnecessary and tighter INL is prioritized. |
| MAX1247ACPP+ | Pin-compatible 12-bit SAR ADC; 133 kSPS max rate; ±1 LSB INL; requires external reference; operates 2.7 V–5.25 V. | Lacks integrated multiplexer-requires external analog switch for multi-channel use; no shutdown pin. | Choose MAX1247ACPP+ only when board space permits discrete mux or when legacy MAX1247 design reuse is mandatory. |
Compared with ADS7841EB/2K5, the ADS7841ES/2K5 trades slightly relaxed linearity tolerance for guaranteed +125°C operation-critical for automotive or industrial edge nodes. Against MAX1247ACPP+, it integrates a 4-channel mux and shutdown control, reducing component count and power management complexity despite identical pin count.
Availability
ADS7841ES/2K5G4 is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, and automotive cabin sensor systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS7841ES/2K5G4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade ICs.
The ADS7841 series belongs to TI's precision SAR ADC product line, designed specifically for low-power, multi-channel data acquisition in battery-operated and thermally demanding environments-emphasizing integration, accuracy, and robust serial interfacing.
FAQ
What is the maximum operating temperature for ADS7841ES/2K5G4?
The ADS7841ES/2K5G4 is specified for continuous operation from –40°C to +125°C. This ES-grade temperature rating is explicitly confirmed in the SBAS084B datasheet's PACKAGE/ORDERING INFORMATION table and Absolute Maximum Ratings section, distinguishing it from commercial-grade variants like ADS7841E (–40°C to +85°C). The device undergoes extended burn-in and characterization at high temperature to ensure parametric stability.
Does ADS7841ES/2K5G4 support true differential input mode?
Yes, ADS7841ES/2K5G4 supports true differential input via its internal multiplexer: setting SGL/DIF = LOW and selecting appropriate A2–A0 bits (e.g., 001 or 101) routes CH0–CH1 or CH2–CH3 as complementary inputs to the SAR core. The –IN input is limited to –0.2 V to +1.25 V, while +IN spans –0.2 V to +VCC + 0.2 V, enabling rejection of common-mode noise within that range.
How does the MODE pin affect ADS7841ES/2K5G4 resolution behavior?
When the MODE pin is held LOW, ADS7841ES/2K5G4 performs 12-bit conversions exclusively-regardless of the MODE bit value in the control byte. This eliminates ambiguity in timing-critical systems. When MODE is HIGH, the control byte's MODE bit selects 12-bit (LOW) or 8-bit (HIGH) output, enabling flexible throughput/resolution trade-offs in firmware-controlled applications.
What is the minimum reference voltage supported by ADS7841ES/2K5G4?
The ADS7841ES/2K5G4 accepts a minimum reference voltage of 100 mV, as stated in the REFERENCE INPUT section of the datasheet. At VREF = 100 mV, LSB size is 24 µV-but internal noise (~30 µVrms) dominates, causing code dithering. Stable operation requires VREF ≥ 250 mV for <1 LSB noise floor; TI recommends ≥500 mV for production designs.
Can ADS7841ES/2K5G4 operate from a 3.3 V supply while maintaining full 200 kHz throughput?
No-200 kHz throughput is specified only at +5 V supply (fCLK = 3.2 MHz). At +3.3 V, the maximum sample rate drops to 125 kHz (fCLK = 2 MHz), per ELECTRICAL CHARACTERISTICS: +2.7V table. Attempting 200 kHz at 3.3 V risks timing violations, incomplete conversions, and degraded INL/DNL due to insufficient internal charge pump drive strength.
ADS7841ES/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7841ES/2K5G4 FAQ
1.How can I place an order for ADS7841ES/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7841ES/2K5G4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS7841ES/2K5G4 reliable?
The price and inventory of ADS7841ES/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7841ES/2K5G4 is usually 5 days.
3.What payment methods are accepted for ADS7841ES/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7841ES/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7841ES/2K5G4?
ADS7841ES/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7841ES/2K5G4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS7841ES/2K5G4?
For technical support, including ADS7841ES/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7841ES/2K5G4 requirements.
6.How does Aetrix verify that ADS7841ES/2K5G4 is sourced from the original manufacturer or authorized distributors?
All ADS7841ES/2K5G4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS7841ES/2K5G4 meets industry standards.
7.What is the process for return or replacement of ADS7841ES/2K5G4?
All ADS7841ES/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7841ES/2K5G4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS7841ES/2K5G4 part is unused and in its original packaging.
Return procedure for ADS7841ES/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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